.l_mian{
    overflow: hidden;
    padding-top:20px;
    width:100%;
    min-height: 680px;
    background: #e7e7e7;
}
.l_mian ul{
    width:100%;
    overflow: hidden;
}
.l_mian ul li{
    float: left;
    width:50%;
    min-height: 14rem;
    background: white;
    text-align: center;
    border-right:1px solid #e2e2e2;
    border-bottom: 1px solid #e2e2e2;
    box-sizing:border-box;
    -moz-box-sizing:border-box; /* Firefox */
    -webkit-box-sizing:border-box; /* Safari */
}
.l_mian ul li a{
    position: relative;
    display: block;
    padding: 15% auto;
    margin: 15% auto;
    width: 70px;
    height: 70px;
    text-align: center;
}
.l_mian ul li a span{
    display: block;
    position: absolute;
    bottom: -3.4rem;
    left:0.4rem;
    font-size:1.6rem;
    color:#333;
}
.c_order{
    background-position: -300px -39px;
}
.c_address{
    background-position: -234px -35px;
}
.c_collection{
    background-position: -94px -35px;
}
.c_message{
    background-position: -168px -39px;
}